Marimo Remote Code Execution Vulnerability

Marimo Marimo

Marimo contains an pre-authorization remote code execution vulnerability, allowing an unauthenticated attacked to shell access and execute arbitrary system commands. Added to CISA KEV on 2026-04-23 (federal deadline 2026-05-07).

First seen: 23 Apr 2026
Last update: 23 Apr 2026, 12:00 UTC
Identifiers: CVE-2026-39987
Source: CISA KEV

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Marimo Remote Code Execution Vulnerability
Severity: high, exploited in the wild. Patch status: patched.
Affected: Marimo Marimo
Ids: CVE-2026-39987

Marimo contains an pre-authorization remote code execution vulnerability, allowing an unauthenticated attacked to shell access and execute arbitrary system commands. Added to CISA KEV on 2026-04-23 (federal deadline 2026-05-07).

## Steps
1. Search the repo, its CI and infra config for Marimo Marimo. If present, report the version in use and whether it's affected.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-39987") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/marimo-team/marimo/security/advisories/GHSA-2679-6mx9-h9xc https://nvd.nist.gov/vuln/detail/CVE-2026-39987
https://pwned.coffee/i/marimo-remote-code-execution-vulnerability-cve-2026-39987

Sources

Totalone hot coffee